Okay.
Let me make this as simple as I can put it.
It is impossible to get this item in the game. It is not sold in the Nook Stores, not at the island, or from Saharah. Therefore, it is impossible to obtain in game without what is about to be covered. Now, with hacks, you can magially create unobtainable items, the so-called "market w/f" being the topic of discussion here. How people have done this? I don't use Homebrew. I don't make hacks. I don't know. Since the only way to get the item is by hacks, we aren't allowed to discuss it. You just can't get it, because there's no legal way to get it, be it from an NPC that's already programmed or DLC backed by Nintendo. Why? Because the programmers wanted it that way.
I get that. But the 7-11 set is obtainable, the furniture is, it's DLC right? I think? But the wallpaper and floor arent. If it is impossible to obtain other than hacks, who made it? If it was made by "hacks", I will poop because my head will explode.